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Actually load profiling information now! Block layout can use real, live, 

actual profile info, and works!  :)

llvm-svn: 11324
This commit is contained in:
Chris Lattner 2004-02-11 18:21:05 +00:00
parent fa9a8f83a5
commit f10f6b10f9
1 changed files with 20 additions and 4 deletions
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24
llvm/lib/Analysis/ProfileInfoLoaderPass.cpp
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@ -15,14 +15,22 @@
#include "llvm/Pass.h"
#include "llvm/Analysis/ProfileInfo.h"
#include "llvm/Analysis/ProfileInfoLoader.h"
#include "Support/CommandLine.h"
using namespace llvm;
namespace {
cl::opt<std::string>
ProfileInfoFilename("profile-info-file", cl::init("llvmprof.out"),
cl::desc(""));
class LoaderPass : public Pass, public ProfileInfo {
std::string Filename;
std::map<BasicBlock*, unsigned> ExecutionCounts;
public:
LoaderPass(const std::string &filename = "llvmprof.out")
: Filename(filename) {}
LoaderPass(const std::string &filename = "")
: Filename(filename) {
if (filename.empty()) Filename = ProfileInfoFilename;
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
@ -35,7 +43,10 @@ namespace {
/// run - Load the profile information from the specified file.
virtual bool run(Module &M);
unsigned getExecutionCount(BasicBlock *BB) { return 0; }
virtual unsigned getExecutionCount(BasicBlock *BB) {
std::map<BasicBlock*, unsigned>::iterator I = ExecutionCounts.find(BB);
return I != ExecutionCounts.end() ? I->second : 0;
}
};
RegisterOpt<LoaderPass>
@ -53,6 +64,11 @@ Pass *llvm::createProfileLoaderPass(const std::string &Filename) {
}
bool LoaderPass::run(Module &M) {
ProfileInfoLoader PIL("opt", Filename, M);
if (PIL.hasAccurateBlockCounts()) {
std::vector<std::pair<BasicBlock*, unsigned> > Counts;
PIL.getBlockCounts(Counts);
ExecutionCounts.insert(Counts.begin(), Counts.end());
}
return false;
}